pulley: Implement a new br_table instruction
#9659
Open
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
alexcrichton
requested review from
abrown and
pchickey
and removed request for
a team
github-actions
bot
added
cranelift
Subscribe to Label Action
This issue or pull request has been labeled: "cranelift", "isle", "pulley"
Thus the following users have been cc'd because of the following labels:
To subscribe or unsubscribe from this label, edit the |
alexcrichton
force-pushed
the
pulley-br-table
branch
from
950fd0b
to
708fa5d
Compare
This is intended to match WebAssembly's `br_table` and Cranelift's version as well. This is implemented as a new `br_table32` opcode where a 32-bit number of branch targets are encoded after `br_table32` all as a `PcRelOffset`, a 32-bit offset. This helps bake in a more "macro opcode" into the interpreter rather than a handful of more primitive opcodes that would achieve the same result with loads/indirect jumps/comparisons/etc.
alexcrichton
force-pushed
the
pulley-br-table
branch
from
708fa5d
to
91b836c
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This is intended to match WebAssembly's
br_tableand Cranelift's version as well. This is implemented as a newbr_table32opcode where a 32-bit number of branch targets are encoded afterbr_table32all as aPcRelOffset, a 32-bit offset. This helps bake in a more "macro opcode" into the interpreter rather than a handful of more primitive opcodes that would achieve the same result with loads/indirect jumps/comparisons/etc.